The Collaborative International Dictionary of English v.0.48:

Morrow \Mor"row\, n. [OE. morwe, morwen, AS. morgen. See
   Morn.]
   1. Morning. [Obs.] "White as morrow's milk." --Bp. Hall.
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            We loved he by the morwe a sop in wine. --Chaucer.
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   2. The next following day; the day subsequent to any day
      specified or understood. --Lev. vii. 16.
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            Till this stormy night is gone,
            And the eternal morrow dawn.          --Crashaw.
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   3. The day following the present; to-morrow.
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   Good morrow, good morning; -- a form of salutation.

   To morrow. See To-morrow in the Vocabulary.
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WordNet (r) 3.0 (2006):

morrow
    n 1: the next day; "whenever he arrives she leaves on the
         morrow"